It all depends how viral the Matrix name has travelled around your company. If people know about it and are waiting for it, I would keep the name (but drop the technical).
If not, I would pick #2 so there is continuity for the original group but the greater company starts off fresh.
I wouldn't overanalyze this for too long, but generally speaking #2 sounds like the smartest bet. I would try to name the community something that is more in step with your most critical strategy this site is address. For us, we chose to use the actual name Clearspace, since it is very meaningful.
+1 for #2 as well. Demote the Matrix community to be a sub-community under the main community site.
Now, the fun part is coming up with a "brand" for the main community site! Here are my picks (some are in jest, of course):
- Secrets - "I'd tell you, but I'd have to kill you."
- VeriNation - "United, we secure."
- The Key - "Unlocking our collective potential"
- Sign Here - "Leaving our mark on this world"
You make a great point that brand experience is important especially with internal community/social networking site. Naming considerations are a big part of building online culture and thus very important. For FG SQUARED, we chose to name our community Clearspace.
Definitely #2, your tech group is probably emotionally invested in The Matrix name by now. How about VeriTalk for the company-wide platform?
Somebody needs to show Rick Palmer this thread. I like that name, The Matrix.
Definitely one of my favorite movies, and you might have heard about how I almost got my wife to dress up as Trinity last Halloween
But I digress. My first reaction to the thread's question was to call it "The Matrix - the site for the VeriSign Community" (just dropping the word Technical to support your enhanced capabilities and not limit it to a technical audience).